Paving machine



R. F. D'URRENFELD PAVING MACHINE ,Filed Fab. 5, 1923 5 Sheets-Sheet 1 ATTORNEY WITNESS:

' Sept. 15.1925.

WITNESS:

R. F. DURRENFELD nvmq lucnma Filed Fab. 3, 1923 ATTORNEY Sept. 15,- 1925.

1,554,072 R. F. DURRENFELD PAVING MACHINE Filed Feb. 3, 1923 5 Sheets-Sheet 4 .l ZZ E D v 1 7/ g/ INVEINTOR WITNESS:

ATTORN EY Sept 15. 1925. 1,554,072

' R. F. DURRENFELD PAVING MACHINE Filed Feb. 3, 1923 5 Sheets-Sheet 5 92 V as fl.f."fiarwerr7e/d MENTOR A TTDRN EY Patented Sept. 15, 1925.

ROBERT 3'5. DURRENFELD, BED \VII-IG, MINNESOTA.

PAVING MACHINE.

Application filed February 3, 1923; 1

To a whom it may concern:

Be it known that I, Bonner F. DURREN FELD, a citizen of the United States, residing at Red Wing, in the county of Goodhue and State of h iinnesota, have invented new and useful Improvements in Paving Machines, of which the following is a specification.

My present invention has reference to a concrete paving machine.

In carrying out my invention it is my purpose to produce a motor propelled machine. vdesigned to travel over a surface to be paved with concrete, to deliver desired quantities of mixed concrete on to such surface, to tamp the concrete and if desired to form grooves therein and ribs between the grooves to prevent slipping on the surface after the same has become dried, all of which being produced in the travel of the machine over such surface.

it is also my purpose to produce a concrete paving machine in which a bed of concrete of a desired depth or thickness may be effectively laid in an easy and expeditious manner.

To the attainment of the foregoing and other objects which will present themselves as the nature of the inventionis better understood, reference is. to be had to the drawings which accompany and which form part of this: application.

1n the drawings 2- Figure l is a side elevation of a concrete paving maohine in accordance with this invention.

Figure 2 is a top plan view thereof.

Figure '3 is a sectional view on the line 8-3 of Figure 1.

Figure 4 is a sectional view on the line 44 of Figure 1.

Figure 5 is a sectional view on the line 55 of Figure 1.

Figure 6 is a sectional view on theline 6 6 of Figure 2.

F igure 7 is a sectional view approximately on the line 7'? of Figure 1, but illustrating a modified construction of the packing roller, the brush and the fluid delivery roller for the brush.

Figure 8 is a top plan iew of the truck which may be employed.

Figure 9is aside elevation of the truck.

In the illustrated embodiment of improvement, it will be seen that I make use of amainor rigid frame 1 and an auxiliary pivoted frame The main frame includes Serial No. 616,793. 2

a flat top 3 provided with suitable-braced depending sides 4, secured to longitudinal beams 5 which project a suitable distance beyond the front of the top or platform .3,

The main frame has journaled between its sides, adjacent the rear end of the said frame a roller 6. The roller is in the nature of a concrete packing member and is provided adjacent its ends with peripherally. continuous ,ribs 7. The ribs are designed to form grooves in the concrete to divide the same into slabs. The trunnions for the roller-1,6 are indicated by the numeral'8;

Above the roller 6 there is supported between the side members of the frame 1 a rotary brush 9. i The fixed sl1aft;for-,this

brush is indicated byethe numeral10. In

peripheral contact with. the brush 9there is a roller 11, the shaft of which beingv indicated by the numeral 12. The lower portion of the roller 11 is arranged in a trough 13, and in this trough there is a suitable-liquid, such as oil, which is delivered on to the face of the brush 9 and from thence delivered on to the face of the packing roller 6 foriremoving any particles ofconcrete which may have adhered thereto, and for likewise im-; partinga surface to thedaid concrete.

The packing roller may. be in the nature of a concaved member 14, .as illustrated in Figure 7 of the drawings, in which instance the brush 15 is rounded outwardly from its ends to its center to contact with the concavedface of the roller 14, while the fluid delivery roller'l6 is concaved or rounded inwardly from its ends to its center so that the same will contact with the outer surface of the brush. This construction is not, designed for ordinary use, but will be found efficient in constructing a concrete walk. which is rounded downwardly from its center to its ends.

Journaled in suitable bearings in the sides 4 of the main frame 1, below and slightly forward of the trough 13 there is a shaft 17 This shaft, adjacent to its ends has cranked portions 18, andbetween the arms provided by the said cranked portions there are pivot-. ed the connected portions of angle brace members 19 of a tamper- 20. The tamper is formed from a single sheet of metal-of comparatively great strength, as. are the arms 19 thereof. The tamper is shaped. to pro vide an outwardly rounded body 21 having its lower end straight, as at 22 and its upper endarranged at an inward angle, as at 23.

Fixed on the cranked portions 18 of the shaft 17 there are rearwardly extending arms 24. The arms are provided with elongated slots that receive therethrough the fixed shaft or trunnions S of the packing roller 6. The slotted arms 24 provide guide means for thetamper 20 in both its Vertical and longitudinal reciprocatory movements.

The numeral 26 designates a shaft for a wall 31 of the hopper there is a depending rounded shield 32 disposed a suitable distance outward from the concrete delivery drum 27, and also a slight but suitable distance below said drum. The inner wall 33 of the hopper is, arranged at an opposite angle to the outer wall 31 thereof, and the said inner wall has its lower end terminating a suitable distance away from the bottom of the hopper thus providing a concrete outlet space 34. Arranged in suitable guideways in; the sides of the. hopper and in con tact wit-h the inner angle wall 33 thereof Y there is a flat plate 35 in the nature of a valve or gate for regulating the width of the space 34, and consequently the amount of concrete delivered from the hopper into the pockets 29 of the drum 27. The gate valve 35 is controlled by a lever 36, or rather by angle or bell crank levers 37 which are pivotally secured to the operating lever 36 and to the gate. The lever 36 is pivoted to an arched rack 38 supported on the top 3 of the fixed frame 1. The lever is provided with a spring influenced dog 39 to engage between the teeth of the rack, and thus effectively sustain the gate valve adjusted with respect to the opening 34 controlled thereby.

Between the projecting beams 5, slightly forward of the hopper 30 there is journaled a shaft 40, and fixed on this shaft there are the traction wheels 41 of the machine. The wheels 41 having peripheral rims to permit the same traveling on angle iron rails 42 which are temporarily laid on the ground excavation to receive the concrete.

The rear of what I have termed the auxiliary or pivoted frame is in the nature of a yoke member, the sides of which have their ends provided with longitudinally extending portions 2. The auxiliary frame, at the juncture of its angle arms are provided with hearing openings for the shaft 26 of the concrete delivery drum 27. The arms 2 of the auxiliary frame are pivoted, as at 43, to upstanding lugs 43 on a bearing sleeve for the shaft 40. From their pivoted ends the arms 40 have inwardly directed angle extensions 2", the ends of which being offset and secured to the outer wall 31 of the hopper 30, and whereby the hopper is supported on the auxiliary frame. Of course, the ends of the hopper may be secured to the ends 2 of the said auxiliary frame.

The yoked inner portion of the auxiliary frame 2 has an upwardly extending bifurcated finger 44 that passes through a suitable opening in the top or platform 3 of the main frame 1. To the bifurcated finger there is pivotally secured an arm 45 fixed on a counter shaft 46 which is journaled in suitable bearings on the said top or platform 3 of the main frame. Keyed on the shaft 46 there is a worm wheel 47 that is in mesh with a worm 48 on a shaft 49 that has a cranked end. The shaft 49 is journaled in a bearing 50 on the platform 3. By turning the shaft 49 the auxiliary frame will be swung on its pivotal connections 43 with the elements 43 to raise or lower the drum and hopper to arrange these elements in proper position with respect to the excavation in which the concrete is to be delivered, and thereby regulatethe depth of the said concrete.

On the flat top or platform 3 on the main frame 1 adjacent to the rear thereof there is supported a motor 51 having its shaft provided with a beveled gear 52. The gear 52 is in mesh with a similar larger gear 53 secured on one end of a longitudinally extending shaft 54. The shaft 54 is journaled in suitable bearings 55 and has keyed or otherwise secured thereon gears 56, 57 and 58 respectively, the gear 58 being of a less diameter than the gear 57, and the gear 56 being likewise of a less diameter than the said gear 57 but of a greater diameter than the gear 58. In mesh with these gears are similar gears 59, 60 and 61 respectively, the gear 61 being of acomparatively large diameter, the gear 60 of a less diameter, and the gear 59 of a still less diameter. These last mentioned gears have their shafts journaled through bearings 62 respectively on the top or platform of the main frame. The shaft 59 for the gear 59 has keyed thereon spaced sprocket wheels 63 and 64 respectively, around which are trained endless chains 65 and 66 respectively. These chains are trained around sprocket wheels 67 and 68 keyed on the respective shafts 10 and 12 whereby the brush 9 or 16) and the roller 11 (or 15) are caused to turn, the brush being rotated at a greater rate of speed than the roller. The shaft for the gears 60 has keyed on its end a sprocket wheel 69 around which is trained a sprocket chain 70 that is also trained. around-a vsprocketawheel .71 keyed on vone end of the, cranle shaft. "17 whereby movement will be imparted to, thetamper; 20.

The ,shaft 61 {for the gear 61 has keyed thereon a sprocket wheel. 72 around which, is loosely trained. asprocketphain 73 that is alsotrained around a sprocket wheelfiaon the shaft E26v for. ,the. concrete delivery. ele-, ment,

On the shaft 40 .for the wheels .41 there is keyed a worm wheel .75 in mesh with the worm ,76 on an .ang'ularly arrangedshaft-W; The-shaftis journaled insuitable bearings 78 on the beams of ,the;main, frame, and has a universal connection. indicated by the numeral 7-9 with a horizontally disposed, shaft, 80, ,journaled, in suitable bearings. ,81 on the platform: of the main frame. ,,Keyedonthe shaftfiO-there, is a. comparatively large gear 82 having on itsface a smaller gear-r63.

. 83 connectingsaid sections. Slidable on the,

shaft 54. there. is sleeve 84, having a spline engagement with theasha'ft. The ,sleeveSfi carries aicomparatively, small; gear 85 and a comparatively, largegea 86. The sleevehas an annulangroove in whichthere is received the forked end-of a throw. lever,.8 7, the lever 'being. suitably supported. .from the. main frame. It will be apparent-that when the lever is operated to. throw-the. sleeve to one position ,the comparativelysmall. gear ,85: will mesh with the comparativelylarge gear 82 so thata comparatively; low, rate of speedwill .be imparted to] the wheels, .41, and that when. theilever. is further operatedwtomove the. sleeve. to bring the comparatively: large gea yfifi intomesh, with thehcomparatively small gear 88, the shaft 40 will be turned at a comparatively high rate of speed to impart a comparatively rapid motion to the machine.

Of course, other means may be provided for both driving the sleeve and driving the revoluble elements of the machine.

W hen it is desired that the machine travel over smooth surfaces from place to place when in use for laying concrete walks or the like, I may employ an auxiliary truck constituting front wheels 88 journaled on a suitable axle provided with a tongue 89 and to the axle there are pivoted, as at 90 angularly disposed arms 91 having hooked ends 92 to engage in bearing eyes 93 secured on the beams 5' at the rear of the wheels 41. The wheels 88 are of a size to elevate the wheels 41 from ground contacting engagement, and the arms 91 resting beneath the axle 40 will efiectively support the front end of the main frame.

With my improvement mixed concrete is fed into the hopper, the gate valve is regulated so that determined quantities of the mmie wi l e f i ter th ,poek taoi the r m siders, to. h 9Ws 7 1 :-.W 1 Of sachet t e pe ker-wh n in c mmu ers: l 1 'PQS QE 19. 1 sh z lf r'ltiflw e: dilQQction of-the arrowin ,Figure; 1v of, the awing wi d iver w ll e. Q. to; he a rl veya. h r mmate; f lin out; of, any of the,pockets,.wil], contact vvitl the ,angle end of. the tamper .21, and therefrom on to theroadwa Anysurplus of concrete is taken up by ,the drum its turning over the arched guard 32 and again; delivered intp one ofthe pocketsof the said drum, Both a vertical and,,longitugilinal reciprocatqry movement is delivered to, the, tamper so that ,the same, ,will effectively, me th n' tc ne f e a he s avenvr te will zbe leveled, through the contact there-,- with by the. 3 straight,- lower end 22 ,Qfalhe, d lnr ni i ng tudin l@ i ever aet thereover The smoothing process,- is. com; p t d y the p c i p er pasei e .QYQlUF Q e er te 116 r ph y t e Peerin roller. may, as previously inferred, ,be ins adie b d ei at-a rQvehen dJairi-r face willrbe impartechto the laidconcrete, il the a ends. were e dir'aelsr's roller will impress, continuous, groove. in, the concrete. V i

It is thought that the foregoing descrip, tion,,,,,whentakenuin connection .with the dravJings viH fully, set. forth the construc tion pperation and adyantages of improve nent to those ,skilled in lithe art ,toj which this; invention relates, so that, furthen detailed ,clescriptionwill not, he required,

Havmpg,,described the Qinventipm I a cla m 1 FQ LQ E wPfl B e ieaa-a wheeled ,body designed q for travel ,over i a surface to beconcreted, means thereon for delivering mixed concrete on to a surface, means regulating such delivery, means for removing surplus concrete from such deposit, means for tamping the concrete, means for smoothing and packing the concrete after the tamping thereof, and means for vertically adjusting the depositing means with respect to the tamping means whereby the depth of the concrete to be laid may be regulated.

2. In a concrete paving machine, a wheeled body designed for travel over a surface to be concreted, means thereon for depositing mixed concrete on a surface, means for regulating the quantity of such deposits, means for removing surplus concrete from such deposits, means for tamping the concrete, means: for rolling the concrete after the tamping thereof, and means for scraping and moistening said last mentioned means.

3. In a concrete paving machine, a wheeled body designed for travel over a surface to be concreted, a concrete hopper thereon, a slidable door controlling the outlet thereof, means for adjusting the door with respect to the outlet,a revoluble member divided into pockets to receive the concrete from the hopper and to deposit the same on a surface, a shield between the hopper and the forward end of said memher, a tamping element to the rear of the member, a roller to the rear of the tamping member, and means for imparting motion to the first mentioned member, the tamper and the roller.

4. In a concrete paving machine, a body having wheels at its forward end and a roller at its rear end, a hopper on the body adjacent to its forward end, a slidable door controlling the outlet of the hopper, means for holding the door adjusted, a revoluble member journaled opposite the outlet of the hopper, including spaced disks and arched partitions connected to the disks providing therebetween concrete receiving pockets, an arched shield between the hopper and the forward end of said member, a tamper to the rear of said member, a grooved roller at the rear of the tamper, means for simultaneously imparting inotion to the member, the tamper and the roller, and means for scraping and moistening the roller. v

5. In a concrete paving machine, a wheeled body comprising a main frame having wheels at its forward end and a roller whose edges are ribbed at its rear end, and an auxiliary frame, a hopper at the forward end of the main frame having an outlet at the inner face of its bottom, a slidable door controlling the outlet, means for adjusting the door with respect to the outlet, a drum comprising end disks andarched partitions provided with pockets for the reception of concrete from the hopper, journaled on the auxiliary frame at the rear of the hopper, means for adjusting the auxiliary frame to arrange the drum determined distances from the ground surface and from the delivery end of the hopper, a tamper to the rear of the drum having a flat lower portion, a body rounded upwardly toward the drum and its upper end flanged rearwardly from the drum, and means dragging the machine and simultaneously imparting motion to the drum, the tamper and the roller.

6. In a concretepaving machine, a motor driven wheeled body, aconcrete receiving hopper at the forward end thereof having an outlet on its inner face at the bottom thereof, a rearwardly arched shield carried by and depending from the hopper, a door controlling the outlet of the hopper, adjusting means therefor, a drum at the rear of the hopper, comprising end disks and arched partitions connecting the disks and providing therebetween pockets to receive concrete from the hopper, a tamper having an arched body portion to the rear of the drum, a roller having its ends provided with projecting ribs journaled at the rear of the tamper, guide means for the tamper, a brush in contact with the periphery'of the roller, revoluble means for imparting'moisture to the brush, and means actuated by the propelling means of the machine for simul taneously imparting motion to the drum, tamper, roller, brush and moistening imparting means for the brush, and regulating means for said motion imparting means.

In testimony whereof I afiix my signature.

ROBERT F. DURRENFELD. 

